/* css variables*/
:root {
  --primary-color: #432E30;
  --primary-color-light: #8E7474;
  --accent-color: #FE6A6B;
  --accent-color-light: #FFE4E4;
  --accent-color-dark: #B94B4C;
  --white-color: #FAFBFC;
  --light-gray-color: #C6CBD1;
  --medium-gray-color: #959DA5;
  --dark-gray-color: #444D56; 
  --bg-color: #F8F8FA;
  --code-bg-color: #F0E8E8;
}

/* normalized */
html, body {
  padding: 0;
  margin: 0;
  font-family: "Times New Roman", "楷体", serif;

  /* font-family: 'Nunito Sans', sans-serif; */
  background-color: white;
  font-size: 1.1em;

}

p {
  font-weight: 300;
  color: #4A4A4A;
}

a, a:hover {
  text-decoration: none;
  color: var(--primary-color);
}

hr {
  padding: 1rem 0;
  border: 0;
  border-bottom: 1px solid var(--bg-color);
}

* {
  box-sizing: border-box;
}

/* global components */

/* typography */
.section__title {
  color: var(--primary-color);
}

/* tabs */
.tab__container {
  position: relative;
}

.tab__container > ul {
  position: absolute;
  list-style: none;
  margin: 0;
  right: 1rem;
  top: -2rem;
  padding-left: 0;
}

.tab__container .code {
  white-space: normal;
  padding: 1rem 1.5rem;
}

.tab {
  display: inline-block;
  padding: 0.3rem 0.5rem;
  font-weight: 200;
  cursor: pointer;
}

.tab.active {
  border-bottom: 1px solid var(--primary-color);
  font-weight: 700;
  display: inline-block;
}

.tab__pane {
  display: none;
}

.tab__pane.active {
  display: block;
}

/* code */
.code {
  border-radius: 3px;
  font-family: Space Mono, SFMono-Regular, Menlo,Monaco, Consolas, Liberation Mono, Courier New, monospace;
  background: var(--bg-color);
  border: 1px solid var(--code-bg-color);
  color: var(--primary-color-light);
}

.code--block {
  white-space: pre-line;
  padding: 0 1.5rem;
}

.code--inline {
  padding: 3px 6px;
  font-size: 80%;
}

/* buttons */
.button--primary {
  padding: 10px 22px;
  background-color: var(--accent-color);
  color: white;
  position: relative;
  text-decoration: none;
  border: 0;
  transition: all .3s ease-out;
}

.button--primary:after {
  position: absolute;
  content: "";
  width: 1rem;
  height: 1rem;
  background-color: var(--accent-color-light);
  right: -0.4rem;
  top: -0.4rem;
  transition: all 0.3s ease-out;
}

.button--primary:hover {
  text-shadow: 0px 1px 1px var(--accent-color-dark);
  color: white;
  transform: translate3D(0, -3px, 0);
}

.button--primary:hover::after {
  transform: rotate(90deg);
}

.button--secondary {
  padding: 10px 22px;
  border: 2px solid var(--primary-color);
  transition: all 0.5s ease-out;
}

.button--secondary:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* links */
.link {
  text-decoration: none;
  transition: all 0.3s ease-out;
}

.link:hover {
  color: var(--accent-color);
}

.link--dark {
  color: var(--primary-color);
}

.link--light {
  color: var(--accent-color);
}

/* menu */
nav {
  display: grid;
  grid-template-columns: 70px auto;
}

.menu {
  margin: 0;
  text-align: right;
  overflow: hidden;
  list-style: none;
}

.toggle {
  display: none;
  position: relative;
}

.toggle span,
.toggle span:before,
.toggle span:after {
  content: '';
  position: absolute;
  height: 2px;
  width: 18px;
  border-radius: 2px;
  background: var(--primary-color);
  display: block;
  cursor: pointer;
  transition: all 0.3s ease-in-out;
  right: 0;
}

.toggle span:before {
  top: -6px;
}

.toggle span:after {
  bottom: -6px;
}

.toggle.open span{
  background-color: transparent;
}

.toggle.open span:before,
.toggle.open span:after {
  top: 0;
}

.toggle.open span:before {
  transform: rotate(45deg);
}

.toggle.open span:after {
  transform: rotate(-45deg);
}

.menu__item {
  padding: 1rem;
  display: inline-block;
}

.menu__item.toggle {
  display: none;
}

/* table */
table {
  border-collapse: collapse;
  width: 100%;
  transition: color .3s ease-out;
  margin-bottom: 2rem;
}

table td, table th {
  border: 1px solid var(--code-bg-color);
  padding: 0.8rem;
  font-weight: 300;
}

table th {
  text-align: left;
  background-color: white;
  border-color: white;
  border-bottom-color: var(--code-bg-color);
}

table td:first-child {
  background-color: var(--bg-color);
  font-weight: 600;
}

@media screen and (max-width: 600px) {
  nav {
    grid-template-columns: 70px auto;
  }

  .menu__item{
    display: none;
  }

  .menu__item.toggle {
    display: inline-block;
  }

  .menu {
    text-align: right;
    padding: 0.5rem 1rem;
  }

  .toggle {
    display: block;
  }

  .menu.responsive .menu__item:not(:first-child) {
    display: block;
    padding: 0 0 0.5rem 0;
  }
}

/* layout */
.wrapper {
  margin: 2rem auto;
  width: 70%;
}

.footer {
  text-align: center;
  background-color: var(--primary-color);
  padding: 2rem;
  color: white;
}

@keyframes fadeUp {
  0% {
    opacity: 0;
    transform: translate3d(0,30px,0);
  }
  100% {
    transform: translate3d(0,0,0);
  }
}

.paper-item {
  background-color: #f8f9fa; /* 浅灰色背景 */
  padding: 8px 12px;         /* 内边距 */
  margin: 4px 0;             /* 外边距 */
  border-radius: 4px;        /* 圆角 */
  border-left: 4px solid #4a90e2; /* 左侧高亮条 */
  transition: all 0.3s ease; /* 平滑过渡效果 */
  font-size:1.2em; /* 字体大小 */
  list-style-type: none; /* 去掉默认列表样式 */
}

.paper-item:hover {
  background-color: #dadfe4; /* 悬停时颜色变化 */
  transform: translateX(4px); /* 轻微右移效果 */
}
.paper-item .tag {
  padding: 4px 4px;
  margin: 0 4px;
  border-radius: 4px;
  font-size: 0.8em;
}

.tag.pdf {
  font-family: "Times New Roman", "楷体", serif;
  background-color: #b9b5c5;  /* 浅黄绿色 */

}

.tag.ccf-t1 {
  background-color: #bbe8d1;  /* 浅黄绿色 */
  font-family: "Times New Roman", "楷体", serif;
}

.tag.top-journal {
  font-family: "Times New Roman", "楷体", serif;
  background-color: #bad7ec;  /* 浅蓝色 */
}
.tag.hold {
  font-family: "Times New Roman", "楷体", serif;
  background-color: #cfbcf0;  /* 浅蓝色 */
}
.tag.participate {
  font-family: "Times New Roman", "楷体", serif;
  background-color: #bad7ec;  /* 浅蓝色 */
}
/* 添加悬停效果 */
.tag:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}